Archive for the ‘repair’ Category

Daniel Bailey from Bit Of A Hack did a repair of a digital Avometer DA116 and documented the whole process on his blog: Anyway, this post is about my AVO DA116. I did this repair a while ago and almost forgot to post about it. I bought a broken...

Ramiro from t4f.org did a repair of a HackRF One and documented the whole process on his blog: I broke my HackRF One. I have no idea how, but I did it. While testing a power amplifier I realized that there was not transmission at all. After checking the software, the...

Steve Gardner did a repair of a 10A Carroll & Meynell Variac and documented the whole process on his blog: I recently purchased a used 10A Carroll & Meynell Variac from eBay for use in the lab, however the variac often caused the 32A B-curve MCB in the consumer unit to...

Quinn Dunki created an Apple II ROM tool project and posted a great write-up on digging into the ROM of her Apple IIc Plus: You may recall way back when I started my Apple II ROM Tool project, that I had intended to fix some bugs. That was the whole...

Mikko has written an article about Marconi 2955A repair: First off, I decided to see what was the deal with the CRT. I have never worked on CRTs before, I have understanding of how the picture is formed by steering the electron beam using the deflection coils but that’s about it....

KA7OEI did a repair on his amplifier. He documented the whole process on his blog: Earlier this year I picked up a Heathkit HL2200 amplifier (the newer, "brown" version of the SB-220) at a local swap meet for a reasonable price. What made it particularly attractive was that it not...

Felix of LowPowerLab writes: I mentioned before that there’s added support for HTTP requests in the gateway interface. That allows using things like wi-fi thermostats, and this story is a review of how I did just that. I wanted to integrate the home thermostat into the Moteino IOT Framework Gateway...

Angus describes on his blog how he used the Bus Blaster to recover a bricked CC3D board: A few months ago I went to upgrade my OpenPilot CC3D board an something went amiss and I ended up trashing the bootloader. I didn’t have a SWD dongle to reprogram it with so its...

A teardown and repair of a Rohde & Schwarz FSH3 3.0GHz portable spectrum analyzer from The Signal Path: In this episode Shahriar examines a faulty R&S FSH3 100kHz – 3.0GHz Portable Spectrum Analyzer. This exceptionally dirty unit does not power on and is missing a power supply and battery. After...

Teardown, repair and analysis of an Anritsu MS2721A 7.1GHz portable spectrum analyzer by Shahriar of TheSignalPath: In this episode Shahriar takes a look at an Anritsu MS2721A portable spectrum analyzer which does not completely boot up. After displaying the message “Application Running!” the unit no longer advances to the main...

Louis Rossmann writes: Here I diagnose a board that has issues on PP3V42_G3H which caused issues with the MCP, whose clock circuit is powered by PP3V42_G3H! I go through my diagnostic process and mindset, and follow from beginning to end as I resolve the problem. Via Hacked Gadgets.

Robson of Dragão sem Chama writes, "this time I want to share my Mega Drive flash cart made of old BIOS chips. I made it because my Sonic cart was not working since always. I used Arduino, Python and a bit of Processing (nice to show visual info) to program" Via the...

Peter Hofmann fixed his drives and documented the whole process on his blog: After about a day of trial and error, I finally fixed my drives. To save anyone else the days worth of effort, I've documented my solution here: Firstly you need to go and find a tool called HDAT2 from www.hdat2.com...

Stian did restoration of 80's arcade. He wrote a post on his blog detailing the process: I did a visual inspection the board looking for shorts or burned out components, and replaced a few 100nF ceramic capacitors that literally had cracked and/or fallen off. I then examined the on-board power supply. It...

Dilshan Jayakody did restoration of TX-310 transmitter and JR-310 receiver step-by-step: I got Trio (now Kenwood) JR-310 and TX-310 SSB receiver and transmitter pair recently. When it comes to me both receiver and transmitter are in very bad shape and most of the PCBs and chassis are covered with dust and some...

Dilshan Jayakody writes: Recently I got vintage Eddystone EC10 MK1 communication receiver from friend of mine and it is completely dead when it comes to me. EC10 MK1 is one of Eddystone's very early solid state communications receivers and it use 10 PNP Germanium transistors. This receiver cover 550 kHz...

Kerry Wong writes: As I mentioned in my previous posting, there was an issue with my Wavetek 907 microwave frequency generator. While everything was fine during my initial testing, the frequency display is now stuck with an out-of-range display and the adjustable frequency range is limited to between around 6.9...

Kerry Wong fixed his HP 5350B OCXO. He documented the whole process on his blog: Last time, I did a teardown of an HP 5350B microwave counter. And as I mentioned in my teardown, the oven-controlled crystal oscillator (OCXO) did not appear to be working as the OVEN indicator would not...

[embed]http://www.youtube.com/watch?v=kMmzITAZkWM[/embed] Teardown and repair of a Fluke 196B Handheld ScopeMeter: In this episode Shahriar goes through the teardown and repair process of a Fluke 196B Handheld ScopeMeter. This unit, which has been purchased as a "dead" unit from eBay, is examined for faults. During the teardown, various PCB components, architecture...